Kooks 1371H430 1-7/8" Stainless Long-Tube Headers & GREEN Catted Y-Pipe

Vehicle Fitment

• 2021-2025 Ford F-150 (5.0L Coyote V8) - verify trim, drivetrain (RWD/4WD) and bed length prior to installation.

Features

• 1-7/8" (≈ 1.875") primary stainless steel tubing for enhanced exhaust flow.
• Includes HIGH-FLOW "GREEN" catted Y-pipe connection for emissions-compatible performance.
• Mandrel-bent 304-series stainless steel construction for durability and corrosion resistance.
• CNC-machined flanges and precision welded joints ensure tight fitment and minimal leak potential.
• Designed to be paired with factory or aftermarket exhaust systems to maximise gains.
• Preserves ride height and original geometry when used with compatible components.
• Manufactured in the USA and backed by limited lifetime warranty to original purchaser.
• Sold as full long-tube header kit including connection Y-pipe and hardware for installation.

Specifications

• Part Number: 1371H430
• Primary Tube Diameter: 1-7/8"
• Collector / Connection Diameter: 3.0" (Y-pipe) typical
• Material: 304 Stainless Steel
• Finish: Raw stainless steel unless otherwise specified
• Installation: Requires removal of factory manifolds/headers; uses provided hardware and gaskets.
• Ride/Height Note: Designed for stock ride height; if suspension or exhaust geometry is modified, check clearance.

Included Components

• 1x Left-side long-tube header (driver side)
• 1x Right-side long-tube header (passenger side)
• 1x GREEN catted Y-pipe connection assembly
• Installation hardware kit (gaskets, bolts, etc.)

Product Description

The Kooks 1371H430 long-tube header kit is engineered for the Ford F-150 equipped with the 5.0L Coyote V8 (model years 2021-2025). This high-performance upgrade replaces the restrictive factory manifolds with 1-7/8" mandrel-bent stainless tubing and pairs with a high-flow catted Y-pipe, enabling improved scavenging, reduced back-pressure and a more liberated exhaust note - resulting in sharper throttle response and enhanced performance.

Installation of this kit opens up the engine's potential for both street and performance use. It's designed for direct-fit compatibility using factory mounting points and includes a connection pipe with high-flow cats for improved emissions-aware performance. Before purchasing, confirm your exact vehicle details including year, trim, engine configuration, drivetrain, and existing exhaust layout to ensure proper fitment and compatibility with your build.